<template>
    <div style="width: 100%;height: 100%;position: relative;">
        <div id="map" style="width: 100%;height: 100%;"></div>
        <div style="
                position: absolute;
                left: 10px; top:10px;
                background-color: rgba(255,255,255,0.4);
                padding: 5px;
                display: flex;flex-direction: column;
                gap:5px;
        ">
            <div style="display: flex;justify-content: center;color: red;font-weight: bold;">多图层覆盖</div>
            <el-button size="mini" @click="addSeries('北京','#a6c84c',BJData)" round style="width: 100px;margin-left: 0 !important;">
                北京
            </el-button>
            <el-button size="mini" @click="addSeries('上海','#ffa022',SHData)" round style="width: 100px;margin-left: 0 !important;">
                上海
            </el-button>
            <el-button size="mini" @click="addSeries('广州','#46bee9',GZData)" round style="width: 100px;margin-left: 0 !important;">
                广州
            </el-button>
        </div>
    </div>
</template>
<script>
    import maps from '@/util/bigMap'

    let BM;
    let map;
    export default {
        mounted() {
            this.initMap();
        },
        data() {
            return {
                geoCoordMap: {
                    '上海': [121.4648, 31.2891],
                    '东莞': [113.8953, 22.901],
                    '东营': [118.7073, 37.5513],
                    '中山': [113.4229, 22.478],
                    '临汾': [111.4783, 36.1615],
                    '临沂': [118.3118, 35.2936],
                    '丹东': [124.541, 40.4242],
                    '丽水': [119.5642, 28.1854],
                    '乌鲁木齐': [87.9236, 43.5883],
                    '佛山': [112.8955, 23.1097],
                    '保定': [115.0488, 39.0948],
                    '兰州': [103.5901, 36.3043],
                    '包头': [110.3467, 41.4899],
                    '北京': [116.4551, 40.2539],
                    '北海': [109.314, 21.6211],
                    '南京': [118.8062, 31.9208],
                    '南宁': [108.479, 23.1152],
                    '南昌': [116.0046, 28.6633],
                    '南通': [121.1023, 32.1625],
                    '厦门': [118.1689, 24.6478],
                    '台州': [121.1353, 28.6688],
                    '合肥': [117.29, 32.0581],
                    '呼和浩特': [111.4124, 40.4901],
                    '咸阳': [108.4131, 34.8706],
                    '哈尔滨': [127.9688, 45.368],
                    '唐山': [118.4766, 39.6826],
                    '嘉兴': [120.9155, 30.6354],
                    '大同': [113.7854, 39.8035],
                    '大连': [122.2229, 39.4409],
                    '天津': [117.4219, 39.4189],
                    '太原': [112.3352, 37.9413],
                    '威海': [121.9482, 37.1393],
                    '宁波': [121.5967, 29.6466],
                    '宝鸡': [107.1826, 34.3433],
                    '宿迁': [118.5535, 33.7775],
                    '常州': [119.4543, 31.5582],
                    '广州': [113.5107, 23.2196],
                    '廊坊': [116.521, 39.0509],
                    '延安': [109.1052, 36.4252],
                    '张家口': [115.1477, 40.8527],
                    '徐州': [117.5208, 34.3268],
                    '德州': [116.6858, 37.2107],
                    '惠州': [114.6204, 23.1647],
                    '成都': [103.9526, 30.7617],
                    '扬州': [119.4653, 32.8162],
                    '承德': [117.5757, 41.4075],
                    '拉萨': [91.1865, 30.1465],
                    '无锡': [120.3442, 31.5527],
                    '日照': [119.2786, 35.5023],
                    '昆明': [102.9199, 25.4663],
                    '杭州': [119.5313, 29.8773],
                    '枣庄': [117.323, 34.8926],
                    '柳州': [109.3799, 24.9774],
                    '株洲': [113.5327, 27.0319],
                    '武汉': [114.3896, 30.6628],
                    '汕头': [117.1692, 23.3405],
                    '江门': [112.6318, 22.1484],
                    '沈阳': [123.1238, 42.1216],
                    '沧州': [116.8286, 38.2104],
                    '河源': [114.917, 23.9722],
                    '泉州': [118.3228, 25.1147],
                    '泰安': [117.0264, 36.0516],
                    '泰州': [120.0586, 32.5525],
                    '济南': [117.1582, 36.8701],
                    '济宁': [116.8286, 35.3375],
                    '海口': [110.3893, 19.8516],
                    '淄博': [118.0371, 36.6064],
                    '淮安': [118.927, 33.4039],
                    '深圳': [114.5435, 22.5439],
                    '清远': [112.9175, 24.3292],
                    '温州': [120.498, 27.8119],
                    '渭南': [109.7864, 35.0299],
                    '湖州': [119.8608, 30.7782],
                    '湘潭': [112.5439, 27.7075],
                    '滨州': [117.8174, 37.4963],
                    '潍坊': [119.0918, 36.524],
                    '烟台': [120.7397, 37.5128],
                    '玉溪': [101.9312, 23.8898],
                    '珠海': [113.7305, 22.1155],
                    '盐城': [120.2234, 33.5577],
                    '盘锦': [121.9482, 41.0449],
                    '石家庄': [114.4995, 38.1006],
                    '福州': [119.4543, 25.9222],
                    '秦皇岛': [119.2126, 40.0232],
                    '绍兴': [120.564, 29.7565],
                    '聊城': [115.9167, 36.4032],
                    '肇庆': [112.1265, 23.5822],
                    '舟山': [122.2559, 30.2234],
                    '苏州': [120.6519, 31.3989],
                    '莱芜': [117.6526, 36.2714],
                    '菏泽': [115.6201, 35.2057],
                    '营口': [122.4316, 40.4297],
                    '葫芦岛': [120.1575, 40.578],
                    '衡水': [115.8838, 37.7161],
                    '衢州': [118.6853, 28.8666],
                    '西宁': [101.4038, 36.8207],
                    '西安': [109.1162, 34.2004],
                    '贵阳': [106.6992, 26.7682],
                    '连云港': [119.1248, 34.552],
                    '邢台': [114.8071, 37.2821],
                    '邯郸': [114.4775, 36.535],
                    '郑州': [113.4668, 34.6234],
                    '鄂尔多斯': [108.9734, 39.2487],
                    '重庆': [107.7539, 30.1904],
                    '金华': [120.0037, 29.1028],
                    '铜川': [109.0393, 35.1947],
                    '银川': [106.3586, 38.1775],
                    '镇江': [119.4763, 31.9702],
                    '长春': [125.8154, 44.2584],
                    '长沙': [113.0823, 28.2568],
                    '长治': [112.8625, 36.4746],
                    '阳泉': [113.4778, 38.0951],
                    '青岛': [120.4651, 36.3373],
                    '韶关': [113.7964, 24.7028]
                },
                BJData: [
                    [{name: '北京'}, {name: '上海', value: 95}],
                    [{name: '北京'}, {name: '广州', value: 90}],
                    [{name: '北京'}, {name: '大连', value: 80}],
                    [{name: '北京'}, {name: '南宁', value: 70}],
                    [{name: '北京'}, {name: '南昌', value: 60}],
                    [{name: '北京'}, {name: '拉萨', value: 50}],
                    [{name: '北京'}, {name: '长春', value: 40}],
                    [{name: '北京'}, {name: '包头', value: 30}],
                    [{name: '北京'}, {name: '重庆', value: 20}],
                    [{name: '北京'}, {name: '常州', value: 10}]
                ],
                SHData: [
                    [{name: '上海'}, {name: '包头', value: 95}],
                    [{name: '上海'}, {name: '昆明', value: 90}],
                    [{name: '上海'}, {name: '广州', value: 80}],
                    [{name: '上海'}, {name: '郑州', value: 70}],
                    [{name: '上海'}, {name: '长春', value: 60}],
                    [{name: '上海'}, {name: '重庆', value: 50}],
                    [{name: '上海'}, {name: '长沙', value: 40}],
                    [{name: '上海'}, {name: '北京', value: 30}],
                    [{name: '上海'}, {name: '丹东', value: 20}],
                    [{name: '上海'}, {name: '大连', value: 10}]
                ],
                GZData: [
                    [{name: '广州'}, {name: '福州', value: 95}],
                    [{name: '广州'}, {name: '太原', value: 90}],
                    [{name: '广州'}, {name: '长春', value: 80}],
                    [{name: '广州'}, {name: '重庆', value: 70}],
                    [{name: '广州'}, {name: '西安', value: 60}],
                    [{name: '广州'}, {name: '成都', value: 50}],
                    [{name: '广州'}, {name: '常州', value: 40}],
                    [{name: '广州'}, {name: '北京', value: 30}],
                    [{name: '广州'}, {name: '北海', value: 20}],
                    [{name: '广州'}, {name: '海口', value: 10}]
                ],
                // 1. 存储已添加的 ECharts 图层实例（按城市名区分）
                addedLayers: {},
                // 2. 存储各城市的显示状态（true=显示，false=隐藏）
                cityShowStatus: {},
            }
        },
        methods: {
            //初始化地图
            initMap() {
                maps.then(() => {
                    BM = window.BM;
                    //这里之后会换成加载瓦片图的地址
                    BM.Config.HTTP_URL = "http://ua.bigemap.com:30081/bmsdk/";
                    map = BM.map('map', 'bigemap.dc-satellite', {
                        crs: BM.CRS.EPSG4326, //坐标参考系统:EPSG4326
                        center: [30.4, 104.5],
                        zoom: 4,
                        zoomControl: false,
                        attributionControl: false,
                    }).addEventListener('zoomend', function (e) {
                        this.zoomLevel = e.target._zoom;
                        console.log('当前级别 : ' + this.zoomLevel);
                    });
                    // 添加街道图层
                    BM.tileLayer("bigemap.dc-street").addTo(map);
                });
            },
            addSeries(name, color, data) {
                // 1. 判断该城市是否已显示：若显示则移除图层
                if (this.cityShowStatus[name]) {
                    // 从地图中移除对应的 ECharts 图层
                    this.addedLayers[name].removeFrom(map);
                    // 删除存储的图层实例
                    delete this.addedLayers[name];
                    // 更新状态为“隐藏”
                    this.cityShowStatus[name] = false;
                    return; // 结束函数，无需后续创建
                }
                // 2. 若未显示：创建新的 ECharts 图层
                let series = [];
                series.push(
                    // 轨迹线 series
                    {
                        id: `${name}-lines1`, // 唯一ID
                        name: name,
                        type: 'lines',
                        coordinateSystem: 'leaflet',
                        zlevel: 1,
                        effect: {show: true, period: 6, trailLength: 0.7, color: '#fff', symbolSize: 3},
                        lineStyle: {normal: {color: color, width: 0, curveness: 0.2}},
                        data: this.convertData(data)
                    },
                    // 火车动画 series
                    {
                        id: `${name}-lines2`, // 唯一ID
                        name: name,
                        type: 'lines',
                        coordinateSystem: 'leaflet',
                        zlevel: 2,
                        symbol: ['none', 'arrow'],
                        symbolSize: 10,
                        effect: {
                            show: true,
                            period: 6,
                            trailLength: 0,
                            symbol: `image://${require('@/assets/images/online_train.png')}`,
                            symbolSize: 15
                        },
                        lineStyle: {normal: {color: color, width: 1, opacity: 0.6, curveness: 0.2}},
                        data: this.convertData(data)
                    },
                    // 散点 series
                    {
                        id: `${name}-scatter`, // 唯一ID
                        name: name,
                        type: 'effectScatter',
                        coordinateSystem: 'leaflet',
                        zlevel: 2,
                        rippleEffect: {brushType: 'stroke'},
                        label: {normal: {show: true, position: 'right', formatter: '{b}'}},
                        symbolSize: (val) => val[2] / 8,
                        itemStyle: {normal: {color: color}},
                        data: data.map((item) => ({
                            name: item[1].name,
                            value: this.geoCoordMap[item[1].name].concat([item[1].value])
                        }))
                    }
                );
                let option = {
                    title: {
                        text: '模拟迁徙',
                        subtext: '数据纯属虚构',
                        textStyle: {
                            color: '#f1f1f1',
                            fontSize: 25
                        },
                        left: 'center'
                    },
                    tooltip: {
                        trigger: 'item'
                    },
                    series: series
                };
                // 3. 创建 ECharts 图层并添加到地图
                let echartsLayer = BM.supermap.echartsLayer(option).addTo(map);
                // 4. 存储图层实例和更新显示状态
                this.addedLayers[name] = echartsLayer;
                this.cityShowStatus[name] = true;
                console.log('Object.keys(this.cityShowStatus)', Object.keys(this.cityShowStatus));
            },
            //转换数据
            convertData(data) {
                let res = [];
                for (let i = 0; i < data.length; i++) {
                    let dataItem = data[i];
                    let fromCoord = this.geoCoordMap[dataItem[0].name];
                    let toCoord = this.geoCoordMap[dataItem[1].name];
                    if (fromCoord && toCoord) {
                        res.push({
                            fromName: dataItem[0].name,
                            toName: dataItem[1].name,
                            coords: [fromCoord, toCoord]
                        });
                    }
                }
                return res;
            },
        }
    }
</script>